add experimental icon support for switcher, still some work to do on it

TODO

@@ -4,7 +4,6 @@
 - Logo to replace speedwm.png
 - Click to minimize
 - Perhaps introduce padding around text/bar
-- Icon support for the switcher. I've done this before but never finished it due to extensive changes it required.
 - Weather module: Allow configuring it
 - rainbowtags but for the layout indicator
 - maybe powerlines for layout indicator

speedwm.c

@@ -3726,18 +3726,23 @@ drawswitcher(int nwins, int first, Monitor *m)
 
 	}
 
-	h = selmon->maxheight  / m->nclients;
+	h = selmon->maxheight / m->nclients;
 
 	int y = 0;
 	int n = 0;
-	for (int i = 0;i < m->nclients;i++) { /* draw all clients into tabwin */
+
+	for (int i = 0; i < m->nclients; i++) {
 		c = m->clientsnext[i];
 		if(!ISVISIBLE(c)) continue;
 		if (HIDDEN(c)) continue;
 
 		n++;
+
 		drw_setscheme(drw, scheme[(c == m->sel) ? SchemeTitleSel : SchemeBar]);
 		drw_text(drw, 0, y, selmon->maxwidth, h, 0, c->name, 0, False);
+        #if USEWINICON
+        if (c->icon) drw_pic(drw, 0, y, selmon->maxwidth, h, c->icon);
+        #endif
 		y += h;
 	}